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		<h1 style="line-height:100px;color:#FFFFFF;">无纸化模拟考试系统</h1>
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       	    	<h1 style="font-size:18px;">Java后台开发工程师笔试题</h1>
                <h5>总分：<span class="orange">100</span>分 合格分数线：<span class="orange">80</span>分 考试时间：<span class="orange">60</span>分钟 来源：</h5>
                                                                                <span class="questypearea" id="qtarea_1">
                <h4 class="qu_type">一、单选题（）</h4>
                                                                <div class="qu_content" onMouseOver="this.className='qu_content_hover'" onMouseOut="this.className='qu_content'" id="qtion_1">
                	<h3><span class="float_l">1、</span><p>下列HTTP错误代码描述正确的是：</p></h3>
                    <div>
                    	<p>A. HTTP 502 -&nbsp;网关错误</p>

<p>B. HTTP 403 -&nbsp;禁止访问</p>

<p>C. HTTP 404 -&nbsp;无法找到文件</p>

<p>D. HTTP 500 -&nbsp;请求无效</p>                    </div>
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                	<h3><span class="float_l">2、</span><p>下列标识符中，（&nbsp;）是正确的变量名？</p></h3>
                    <div>
                    	<p>A. int</p>

<p>B. one-hundred</p>

<p>C. 1thing</p>

<p>D. thing1</p>                    </div>
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		                        		                        		                        <label class="radio inline">B <input type="radio" name="question[3]" rel="3" value="B" /></label>&nbsp;&nbsp;
		                        		                        		                        <label class="radio inline">C <input type="radio" name="question[3]" rel="3" value="C" /></label>&nbsp;&nbsp;
		                        		                        		                        <label class="radio inline">D <input type="radio" name="question[3]" rel="3" value="D" /></label>&nbsp;&nbsp;
		                        		                        		                        	                        
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                	<h3><span class="float_l">3、</span><p>执行下列语句后，i&nbsp;和n的值为（&nbsp;）int i=10;int n= i++%5;</p></h3>
                    <div>
                    	<p>A. 10，0</p>

<p>B. 11，1</p>

<p>C. 10，1</p>

<p>D. 11，0</p>                    </div>
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		                        		                        		                        <label class="radio inline">C <input type="radio" name="question[4]" rel="4" value="C" /></label>&nbsp;&nbsp;
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                	<h3><span class="float_l">4、</span><p>已知二叉树后序遍历序列是dabec，中序遍历序列是debac，它的前序遍历序列是：</p></h3>
                    <div>
                    	<p>A. acbed</p>

<p>B. decab</p>

<p>C. deabc</p>

<p>D. cedba</p>                    </div>
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                	<h3><span class="float_l">5、</span><p>在MVC框架中，哪两部分的访问不是双向的。</p></h3>
                    <div>
                    	<p>A. M和V</p>

<p>B. V和C</p>

<p>C. M和C</p>

<p>D. 以上说法均是错误的</p>                    </div>
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		                        		                        		                        <label class="radio inline">D <input type="radio" name="question[7]" rel="7" value="D" /></label>&nbsp;&nbsp;
		                        		                        		                        	                        
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                	<h3><span class="float_l">6、</span><p>要想在你的视图上成功的执行<span style="line-height: 1.6em;">查询需要做什么？</span></p></h3>
                    <div>
                    	<p>A.&nbsp;只能在基础表中有select权限</p>

<p>B.&nbsp;在视图中需要有select权限</p>

<p>C.&nbsp;基础表中必须有数据</p>

<p>D.&nbsp;基础表必须在同一个&nbsp;用户模式中</p>                    </div>
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                        			                        		                        		                        <label class="radio inline">A <input type="radio" name="question[9]" rel="9" value="A" /></label>&nbsp;&nbsp;
		                        		                        		                        <label class="radio inline">B <input type="radio" name="question[9]" rel="9" value="B" /></label>&nbsp;&nbsp;
		                        		                        		                        <label class="radio inline">C <input type="radio" name="question[9]" rel="9" value="C" /></label>&nbsp;&nbsp;
		                        		                        		                        <label class="radio inline">D <input type="radio" name="question[9]" rel="9" value="D" /></label>&nbsp;&nbsp;
		                        		                        		                        	                        
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                                                <div class="qu_content" onMouseOver="this.className='qu_content_hover'" onMouseOut="this.className='qu_content'" id="qtion_10">
                	<h3><span class="float_l">7、</span><p>关于以下程序代码的说明正确的是：</p>

<p>public class HasStatic{<br />
<span style="line-height: 1.6em;">&nbsp; &nbsp; private static int x=100;<br />
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp;</span><span style="line-height: 1.6em;">public static void main(String args[]){<br />
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="line-height: 1.6em;">HasStatic hs1=new HasStatic();<br />
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="line-height: 1.6em;">hs1.x++;<br />
<br />
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="line-height: 1.6em;">HasStatic&nbsp;&nbsp;hs2=new HasStatic();<br />
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="line-height: 1.6em;">hs2.x++;<br />
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br />
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;h</span><span style="line-height: 1.6em;">s1=new HasStatic();<br />
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="line-height: 1.6em;">hs1.x++;<br />
<br />
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</span><span style="line-height: 1.6em;">&nbsp;</span><span style="line-height: 1.6em;">HasStatic.x--;<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</span><span style="line-height: 1.6em;">System.out.println(&quot;x=&quot;+x);<br />
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp;</span><span style="line-height: 1.6em;">}</span><br />
<span style="line-height: 1.6em;">}</span></p></h3>
                    <div>
                    	<p>A.&nbsp;程序通过编译，输出结果为：x=103</p>

<p>B. 10行不能通过编译，因为x是私有静态变量</p>

<p>C. 5行不能通过编译，因为引用了私有静态变量</p>

<p>D.&nbsp;程序通过编译，输出结果为：x=102</p>                    </div>
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                                                <div class="qu_content" onMouseOver="this.className='qu_content_hover'" onMouseOut="this.className='qu_content'" id="qtion_11">
                	<h3><span class="float_l">8、</span><p>在实现DAO设计模式时，下面哪种模式经常被采用：</p></h3>
                    <div>
                    	<p>A. Proxy模式</p>

<p>B. Factory模式</p>

<p>C. Prototype模式</p>

<p>D. Observer模式</p>                    </div>
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<p>B.&nbsp;垃圾收集将检查并释放不再使用的内存。</p>

<p>C.&nbsp;垃圾收集允许程序开发者明确指定并立即释放该内存。</p>

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                    	<p>A.&nbsp;实例变量是类的成员变量。</p>

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